Watermelon Tourmaline · Facet Rough · 11.7 ct · Untreated · Bi-Color

This remarkable natural bi-color tourmaline from Afghanistan combines impressive crystal size with a striking transition between fresh green and delicate rosy pink. Even in its natural state, the crystal displays the characteristic geometry that makes fine tourmaline rough so appealing to collectors and precision gem cutters alike.

At 11.74 carats, this crystal offers generous material for a substantial finished gemstone. With an estimated 90% facetable volume, it provides excellent opportunities to retain much of the original weight while developing a design that showcases both brilliance and the crystal’s unique color zoning.

The transparent material and high clarity allow light to pass freely through the crystal, revealing the natural blend of green and pink that has made Afghan bi-color tourmalines highly desirable. Depending on the orientation during cutting, the finished gemstone can emphasize either the distinct color separation or create a harmonious transition between both hues. This flexibility makes the rough suitable for a wide variety of precision faceting designs, from elegant emerald cuts to brilliant cushions or custom creations.

Untreated tourmalines preserve the colors created by nature over millions of years. Every inclusion, crystal face, and color transition tells part of the gemstone’s geological history. This crystal offers the rare opportunity to transform that natural beauty into a one-of-a-kind faceted gemstone while preserving its individual character.

Specifications

• Stone type: Natural Tourmaline
• Origin: Afghanistan
• Weight: 11.74 ct
• Dimensions: 13.3 × 10.3 × 9.9 mm
• Treatment: Untreated
• Clarity: Clear
• Color: Green / Rosy (Bi-Color)
• Transparency: Transparent
• Rough Type: Crystal
• Facet Potential: Facet Grade
• Facetable Volume: ~90%